river-tag-overlay: fix cross

pkgs/applications/misc/river-tag-overlay/default.nix

···
-{ lib, stdenv, fetchFromSourcehut, nixos, wayland, pixman, pkg-config }:
+{ lib, stdenv, fetchFromSourcehut, fetchpatch
+, wayland, pixman, pkg-config, wayland-scanner
+}:
 
 stdenv.mkDerivation rec {
   pname = "river-tag-overlay";
···
     hash = "sha256-hLyXdLi/ldvwPJ1oQQsH5wgflQJuXu6vhYw/qdKAV9E=";
   };
 
+  patches = [
+    # Backport cross fix.
+    (fetchpatch {
+      url = "https://git.sr.ht/~leon_plickat/river-tag-overlay/commit/791eaadf46482121a4c811ffba13d03168d74d8f.patch";
+      sha256 = "CxSDcweHGup1EF3oD/2vhP6RFoeYorj0BwmlgA3tbPE=";
+    })
+  ];
+
   buildInputs = [ pixman wayland ];
-  nativeBuildInputs = [ pkg-config ];
+  nativeBuildInputs = [ pkg-config wayland-scanner ];
 
   makeFlags = [
     "DESTDIR=${placeholder "out"}"